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1. 发明授权

US4946872A Polyisocyanate prepolymers prepared from rigid polyaromatic precursor materials, and polyurethanes prepared therefrom 失效
标题翻译：由刚性多芳族前体材料制备的多异氰酸酯预聚物和由其制备的聚氨酯
公开(公告)号：US4946872A
公开(公告)日：1990-08-07
申请号：US330537
申请日：1989-03-30
申请人： Oomman P. Thomas , Earl E. Burt, III , Richard D. Peffley
发明人： Oomman P. Thomas , Earl E. Burt, III , Richard D. Peffley
IPC分类号： C08G18/48 , C08G18/80 , C08G18/81
CPC分类号： C08G18/815 , C08G18/4879 , C08G18/8012 , C08G18/8038 , C08G18/8058 , C08G18/8191
摘要： A liquid prepolymer composition is disclosed which contains free isocyanate groups which is the reaction product of a stoichiometric excess of a polyisocyanate and an active hydrogen-containing compound which contains an internal rigid polyaromatic grouping. Polyurethane and/or polyurea polymers made from these prepolymer compositions are also disclosed.
摘要翻译：公开了一种液体预聚物组合物，其含有游离异氰酸酯基团，其是化学计量过量的多异氰酸酯和含有内部刚性多芳族基团的含活性氢化合物的反应产物。还公开了由这些预聚物组合物制成的聚氨酯和/或聚脲聚合物。

2. 发明授权

US4913821A Method for the determination of phenols in water 失效
标题翻译：测定水中酚类的方法
公开(公告)号：US4913821A
公开(公告)日：1990-04-03
申请号：US343967
申请日：1989-04-27
申请人： Richard G. Melcher , Earl E. Burt, III
发明人： Richard G. Melcher , Earl E. Burt, III
IPC分类号： G01N30/06 , G01N30/16 , G01N30/40 , G01N30/88 , G01N33/18
CPC分类号： G01N30/88 , G01N2030/062 , G01N2030/405 , G01N30/16 , G01N30/40 , G01N33/1826 , Y10S210/909 , Y10T436/203332 , Y10T436/212 , Y10T436/255
摘要： A chromatographic method for the determination of individual phenols in water by adding a halogenating agent to the water, e.g., using the bromate-bromide reaction to generate tribromide ions which react with the phenols to form bromo-derivatives of the phenols, then to permeate the bromo-derivatives across a membrane, e.g., a silicone rubber membrane, into a liquid extractant, e.g., a dilute aqueous solution of sodium hydroxide and acetonitrile, and then determining the permeated bromo-derivatives in the liquid extractant by chromatography, e.g., by injecting the liquid extractant containing the permeated bromo-derivatives into a reverse phase liquid chromatographic system. The use of a membrane is essential in the present invention because it allows the use of a high enough concentration of halogenating agent to completely halogenate most any sample and provides for the removal of the halo-derivatives from the halogenation reaction site before any substantial degradation of the halo-derivatives occurs from a relatively high concentration of halogenating agent. Total phenols as a group can be determined by modifying the method to use backflow liquid chromatography to eliminate potential interferences and to elute the halo-derivatives in a single chromatographic peak.
摘要翻译：用于通过向水中加入卤化剂来测定水中单个酚的色谱法，例如使用溴溴化物反应产生与苯酚反应形成酚的溴代衍生物的三溴离子，然后渗透到溴代衍生物穿过膜，例如硅橡胶膜，转变成液体萃取剂，例如稀释的氢氧化钠和乙腈水溶液，然后通过色谱法测定液体萃取剂中的渗透的溴衍生物，例如通过注射含有渗透的溴衍生物的液体萃取剂进入反相液相色谱系统。在本发明中使用膜是必需的，因为它允许使用足够高的卤化剂浓度使大多数任何样品完全卤化，并且在任何显着降解之前提供从卤化反应位点除去卤代衍生物卤代衍生物来自较高浓度的卤化剂。可以通过改变使用回流液相色谱以消除潜在干扰并在单个色谱峰中洗脱卤素衍生物的方法来测定总酚。

3. 发明授权

US4894403A Polyisocyanate compositions containing rigid compounds or polymers, and polyurethanes prepared therefrom 失效
标题翻译：含有刚性化合物或聚合物的聚异氰酸酯组合物和由其制备的聚氨酯
公开(公告)号：US4894403A
公开(公告)日：1990-01-16
申请号：US73045
申请日：1987-07-14
申请人： Oomman P. Thomas , Richard D. Peffley , Earl E. Burt, III
发明人： Oomman P. Thomas , Richard D. Peffley , Earl E. Burt, III
IPC分类号： C08L33/14 , C08F8/00 , C08G18/62 , C08G18/70 , C08L33/04 , C08L75/00
CPC分类号： C08L75/00 , C08G18/708 , C08G2120/00
摘要： Polyisocyanates containing dissolved or colloidally dispersed polymers containing rigid moieties are disclosed. Included among the dissolved or colloidally dispersed polymers are polymers ethylenically unsaturated polyaromatic compounds, ethylenically unsaturated benzoic acid derivatives, ethylenically unsaturated steroid derivatives, and rigid aromatic polyurethane and/or polyurea polymers. The dissolved or colloidally dispersed polymers provide substantial reinforcement and physical property improvement to polyurethane or polyurea polymers made from the polyisocyanate solution or dispersion.

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